RFC 3840 (rfc3840) - Page 1 of 36

Indicating User Agent Capabilities in the Session Initiation Protocol (SIP)

Alternative Format: Original Text Document
Network Working Group                                       J. Rosenberg
Request for Comments: 3840                                   dynamicsoft
Category: Standards Track                                 H. Schulzrinne
                                                     Columbia University
                                                              P. Kyzivat
                                                           Cisco Systems
                                                             August 2004


                 Indicating User Agent Capabilities in
                 the Session Initiation Protocol (SIP)

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2004).

Abstract

   This specification defines mechanisms by which a Session Initiation
   Protocol (SIP) user agent can convey its capabilities and
   characteristics to other user agents and to the registrar for its
   domain.  This information is conveyed as parameters of the Contact
   header field.




















Rosenberg, et al.           Standards Track
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